排序方式: 共有3条查询结果,搜索用时 0 毫秒
1
1.
Shipboard X-band radar images acquired on 24 June 2009 are used to study nonlinear internal wave characteristics in the northeastern
South China Sea. The studied images show three nonlinear internal waves in a packet. A method based on the Radon Transform
technique is introduced to calculate internal wave parameters such as the direction of propagation and internal wave velocity
from backscatter images. Assuming that the ocean is a two-layer finite depth system, we can derive the mixed-layer depth by
applying the internal wave velocity to the mixed-layer depth formula. Results show reasonably good agreement with in-situ
thermistor chain and conductivity-temperature-depth data sets. 相似文献
2.
A new ocean wave and sea surface current monitoring system with horizontally-(HH) and vertically-(VV) polarized X-band radar
was developed. Two experiments into the use of the radar system were carried out at two sites, respectively, for calibration
process in Zhangzi Island of the Yellow Sea, and for validation in the Yellow Sea and South China Sea. Ocean wave parameters
and sea surface current velocities were retrieved from the dual polarized radar image sequences based on an inverse method.
The results obtained from dual-polarized radar data sets acquired in Zhangzi Island are compared with those from an ocean
directional buoy. The results show that ocean wave parameters and sea surface current velocities retrieved from radar image
sets are in a good agreement with those observed by the buoy. In particular, it has been found that the vertically-polarized
radar is better than the horizontally-polarized radar in retrieving ocean wave parameters, especially in detecting the significant
wave height below 1.0 m. 相似文献
3.
X-波段船用雷达观测海洋动力环境要素仿真研究 总被引:3,自引:0,他引:3
为了评估X-波段船载雷达观测海浪和海流参数的能力.基于随机海浪理论和雷达几何成像原理模拟了不同调制影响的X-波段船用雷达图像序列,介绍了估算海浪参数和海流参数的算法,对影响雷达观测海流和海浪有关因素进行了分析.同时在雷达图像中加入了随机高斯白噪声,并通过数值方法验证了雷达图像的信噪比开方和有效波高之间的线性关系.数值模拟结果说明X-波段船用雷达能够有效地估算海浪和海流参数,且带有不同噪声水平的雷达系统应具有不同的定标系数. 相似文献
1